基于动态分布参数模型的光伏太阳能热泵系统的数值模拟  

THE NUMERICAL SIMULATION BASE ON A DYNAMIC AND DISTRIBUTED MODEL FOR A PHOTOVOLTAIC SOLAR ASSISTED HEAT PUMP

作　　者：何汉峰[1] 季杰[1] 裴刚[1] 何伟[1] 刘可亮[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230026

出　　处：《太阳能学报》2008年第12期1504-1509,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50478023;50708105);安徽省自然科学基金(070414161)

摘　　要：采用分布参数法,根据平衡均相流理论,建立了光伏太阳能热泵(PV-SAHP)系统的动态分布参数模型。通过数值模拟对系统在动态工况下的光电光热性能进行研究。研究结果显示 PV-SAHP 系统具备优越的光电光热性能,系统的 COP 为3.1～5.8,全天的平均值为4.8,明显高于普通的风冷热泵;系统光电转换效率为12.38%～13.31%;系统全天的平均光电功率为375W,相当于系统平均功耗(474.8W)的79%。对模拟结果进行对比分析后发现系统光电光热性能主要由太阳辐照强度所决定,并受环境温度的影响。According to the theory of homogeneous flow and thermodynamics of refrigeration system, a dynamic and distributed model was presented to described the dynamic behavior of the photovohaic solar assisted heat pump system. The numerical simulation with various solar radiation and ambient temperature was done. The results indicate that the PVSAHP has good coefficient of performance （COP） and photovoltaic efficiency. The daily average COP of the system is about 4.8 which is higher than that of air-soure heat pump. The photovoltaic efficiency ranges from 12.38% to 13. 31%. The average electricity output is about 375W which is about 79 % of average power consumption of the compressor. The results also show that the PV and solar thermal performance of the system is mainly decided by the solar irradiation, also is influenced by the ambient temperature.

关 键 词：太阳能热泵 光伏蒸发器 动态 数值模拟 分布参数 性能系数 

分 类 号：TK514[动力工程及工程热物理—热能工程] TK511.2